Strategic relationships go a long way in helping you fulfill purpose. No man has ever made it alone. According to Malcolm Gladwell in his book The Outliers, he said "...and no one—not rock stars, not professional athletes, not software billionaires, and not even geniuses — ever makes it alone. Successful people don't do it alone. Where they come from matters. They're products of particular places and environments."
Everyone belongs somewhere but only quite a few belong to the right place. The company you keep has a crucial role to play in either making or marring you. They affect the way you think and you are what you think. Associating with the wise enhances mental development, makes you wise too. So it is very important that you pay attention to the kinds of people in your life. You should build positive relationships that spur you into becoming the best. Surround yourself with people of like mind, people that add to you and not just subtract all the time. While also having in mind the need to become a person who also adds value to others.
Once in a while, sit back and review your relationships. Some people draw your energy and depreciate you. Friendship is by choice not by force. You can't live your life to please everyone. Don't ever subjugate your purpose for emotions or relationships. Your purpose should be the basis for your relationships and relationships built on purpose never die. A person who is not a friend of your purpose is not your true friend.